By adding support for the old API many of the useful on-dock progress bars and badge counts that currently show up on the Unity launcher should now also show up on the Ubuntu Dock too.

This will include things like Firefox download progress and number of downloads (with the UnityFox Revived add-on installed), unread messages in Thunderbird, and in chat apps like Telegram, Skype, and Rambox, and so on.

Launcher indicators in use on the Unity desktop

If you’re already running Ubuntu 17.10 you should receive an update to the Ubuntu Dock in the next few days. If you’re impatient you can force install it from here, though you will need to restart your GNOME session to get it to work.